National Bank, Bruff Branch (County Limerick), Proof £20 on unwatermarked paper, by Perkins Bacon and Co, London, Hibernia seated top centre with harp, Irish wolfhound and symbols of commerce and prosperity, turreted arms top left, TWENTY in overprint at centre (cf P.A56), printer's annotation in pencil low right "To this Feb. 20/66", produced, as dated, 20th February 1866, mounting traces, about extremely fine